Webster's Revised Unabridged Dictionary · 1913

mach number

mach number , noun

(aeronautics) The ratio of the speed of a moving body to the speed of sound.

Text from the public-domain GNU Collaborative International Dictionary of English, derived from Webster's Revised Unabridged Dictionary (1913). Definitions marked with were added by later GCIDE contributors and are not in the original 1913 edition.

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